The role of 14N and 13C hyperfine structure in characterizing point defects in diamond |
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Authors: | Baker JM Hunt DC Newton ME Twitchen D Nadolinny VA Feigelson BI |
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Institution: | (1) Oxford Physics, Clarendon Laboratory, Parks Road, OX1 3PU Oxford, UK;(2) Institute of Inorganic Chemistry, Novosibirsk, 630090, Russia;(3) Technocrystal, Moscow, Russia |
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Abstract: | Hyperfine structure (hfs), of either 13C or 14N, observed in the electron paramagnetic resonance (EPR) spectrum, has been a remarkably powerful indicator of the models
of paramagnetic defects in diamond. It has often been valuable or necessary to use the much higher resolution of electron
nuclear double resonance (ENDOR). Measurements of hfs have recently allowed considerable progress in understanding the nature
of defects which have been uncharacterized for many years. A rich variety of defects involving up to at least 4 N atoms, which
readily substitute for C atoms, has been found in diamond. The role of 14N hfs is reviewed in solving problems where different aspects are relevant. The use of synthetic diamond, enriched by up to
10% in 13C, has greatly facilitated the construction of models for centres produced by radiation damage, where the only information
is from 13C hfs. Both 14N and 13C hfs have confirmed models of Ni related centres.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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